A cat jumps from 2.5-meter-tall bookshelf to a 1.3-meter-tall countertop. If the cat has a mass of 15kg on Earth, what is the change in the potential energy of the cat.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?

What is the prp when using 5 mhz acoustic waves through soft tissue, imaging a death of 20 cm?